Defective Bismuth Oxide as Effective Adsorbent for Arsenic Removal from Water and Wastewater

Ramona Balint; Mattia Bartoli; Pravin Jagdale; Alberto Tagliaferro; Abdul Samad Memon; Massimo Rovere; Maria Martin

doi:10.3390/toxics9070158

Defective Bismuth Oxide as Effective Adsorbent for Arsenic Removal from Water and Wastewater

Toxics. 2021 Jul 2;9(7):158. doi: 10.3390/toxics9070158.

Authors

Ramona Balint^{1

2}, Mattia Bartoli^{3

4}, Pravin Jagdale³, Alberto Tagliaferro^{4

5}, Abdul Samad Memon⁵, Massimo Rovere^{4

5}, Maria Martin¹

Affiliations

¹ Department of Agricultural, Forest and Food Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Italy.
² Geological Institute of Romania, Strada Caransebes nr. 1, Sector 1, 012271 Bucharest, Romania.
³ Center for Sustainable Future Technologies, Italian Institute of Technology, Via Livorno 60, 10144 Turin, Italy.
⁴ National Consortium for Materials Science and Technology (INSTM), Via G. Giusti 9, Florence 50121, Italy.
⁵ Department of Applied Science and Technology, Polytechnic of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.

Abstract

In this work, we report solid-state synthetized defective Bi₂O₃ containing Bi(V) sites as effective and recyclable arsenic adsorbent materials. Bi₂O₃ was extensively characterized, and structure-related adsorption processes are reported. Both As(V) and As(III) species-adsorption processes were investigated in a wide range of concentrations, pH values, and times. The effect of several competing ions was also tested together with the adsorbent recyclability.

Keywords: adsorption; arsenic; bismuth oxide; water treatment.